package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: wwy
 * Date: 2024-09-03
 * Time: 23:01
 */
public class DelOperation implements IOperation{
    @Override
    public void work(BookList bookList){
        System.out.println("删除图书...");
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入你要删除的书名:");
        String name= scanner.nextLine();
        int currentSize=bookList.getUsedSize();
        int pos=-1;
        int i = 0;
        for (; i <currentSize; i++) {
            Book book=bookList.getBook(i);
            if (book.getName().equals(name)){
                System.out.println("找到了这本书:");
                pos=i;
                break;
            }
        }
        if (i == currentSize) {
            System.out.println();
            return;
        }else{
            for (int j = pos; j < currentSize-1; j++) {
                Book book=bookList.getBook(j+1);
                bookList.setBook(j,book);
            }
            bookList.setBook(currentSize-1,null);
            bookList.setUsedSize(currentSize-1);
            System.out.println("删除成功");
        }
    }
}
